Stocks have had a strong year so far, with share prices rising approximately 50% since bottoming in October 2022. This is the best performance since 1957. However, historically, traders are looking for certain stocks to sell during substantial growth. Typically, stocks experience some pullback, defined as a 10% decline from the recent high. While they do not seem ready to sell yet, there are hints of unease as investors worry about the concentration of gains within a small group of large tech companies.In f ...